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ENH: Code is now robust to New method returning NULL.

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This commit is contained in:
Brad King 2003-12-13 10:36:22 -05:00
parent 128f3cbd00
commit dc96992e56
2 changed files with 84 additions and 19 deletions
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47
Source/kwsys/ProcessUNIX.c
View File

@ -183,6 +183,12 @@ kwsysProcess* kwsysProcess_New()
/*--------------------------------------------------------------------------*/
void kwsysProcess_Delete(kwsysProcess* cp)
{
/* Make sure we have an instance. */
if(!cp)
{
return;
}
/* If the process is executing, wait for it to finish. */
if(cp->State == kwsysProcess_State_Executing)
{
@ -203,6 +209,10 @@ void kwsysProcess_Delete(kwsysProcess* cp)
int kwsysProcess_SetCommand(kwsysProcess* cp, char const* const* command)
{
int i;
if(!cp)
{
return 0;
}
for(i=0; i < cp->NumberOfCommands; ++i)
{
char** c = cp->Commands[i];
@ -232,7 +242,7 @@ int kwsysProcess_AddCommand(kwsysProcess* cp, char const* const* command)
char*** newCommands;
/* Make sure we have a command to add. */
if(!command)
if(!cp || !command)
{
return 0;
}
@ -300,6 +310,10 @@ int kwsysProcess_AddCommand(kwsysProcess* cp, char const* const* command)
/*--------------------------------------------------------------------------*/
void kwsysProcess_SetTimeout(kwsysProcess* cp, double timeout)
{
if(!cp)
{
return;
}
cp->Timeout = timeout;
if(cp->Timeout < 0)
{
@ -310,6 +324,10 @@ void kwsysProcess_SetTimeout(kwsysProcess* cp, double timeout)
/*--------------------------------------------------------------------------*/
void kwsysProcess_SetWorkingDirectory(kwsysProcess* cp, const char* dir)
{
if(!cp)
{
return;
}
if(cp->WorkingDirectory == dir)
{
return;
@ -349,31 +367,35 @@ void kwsysProcess_SetOption(kwsysProcess* cp, int optionId, int value)
/*--------------------------------------------------------------------------*/
int kwsysProcess_GetState(kwsysProcess* cp)
{
return cp->State;
return cp? cp->State : kwsysProcess_State_Error;
}
/*--------------------------------------------------------------------------*/
int kwsysProcess_GetExitException(kwsysProcess* cp)
{
return cp->ExitException;
return cp? cp->ExitException : kwsysProcess_Exception_Other;
}
/*--------------------------------------------------------------------------*/
int kwsysProcess_GetExitCode(kwsysProcess* cp)
{
return cp->ExitCode;
return cp? cp->ExitCode : 0;
}
/*--------------------------------------------------------------------------*/
int kwsysProcess_GetExitValue(kwsysProcess* cp)
{
return cp->ExitValue;
return cp? cp->ExitValue : -1;
}
/*--------------------------------------------------------------------------*/
const char* kwsysProcess_GetErrorString(kwsysProcess* cp)
{
if(cp->State == kwsysProcess_State_Error)
if(!cp)
{
return "Process management structure could not be allocated.";
}
else if(cp->State == kwsysProcess_State_Error)
{
return cp->ErrorMessage;
}
@ -388,7 +410,7 @@ void kwsysProcess_Execute(kwsysProcess* cp)
kwsysProcessCreateInformation si = {-1, -1, -1, -1, {-1, -1}};
/* Do not execute a second copy simultaneously. */
if(cp->State == kwsysProcess_State_Executing)
if(!cp || cp->State == kwsysProcess_State_Executing)
{
return;
}
@ -500,6 +522,13 @@ int kwsysProcess_WaitForData(kwsysProcess* cp, char** data, int* length,
int pipeId = kwsysProcess_Pipe_None;
int numReady = 0;
/* Make sure we are executing a process. */
if(!cp || cp->State != kwsysProcess_State_Executing || cp->Killed ||
cp->TimeoutExpired)
{
return kwsysProcess_Pipe_None;
}
/* Record the time at which user timeout period starts. */
if(userTimeout)
{
@ -687,7 +716,7 @@ int kwsysProcess_WaitForExit(kwsysProcess* cp, double* userTimeout)
int pipe = 0;
/* Make sure we are executing a process. */
if(cp->State != kwsysProcess_State_Executing)
if(!cp || cp->State != kwsysProcess_State_Executing)
{
return 1;
}
@ -804,7 +833,7 @@ void kwsysProcess_Kill(kwsysProcess* cp)
int i;
/* Make sure we are executing a process. */
if(cp->State != kwsysProcess_State_Executing)
if(!cp || cp->State != kwsysProcess_State_Executing)
{
return;
}

56
Source/kwsys/ProcessWin32.c
View File

@ -406,6 +406,12 @@ void kwsysProcess_Delete(kwsysProcess* cp)
{
int i;
/* Make sure we have an instance. */
if(!cp)
{
return;
}
/* If the process is executing, wait for it to finish. */
if(cp->State == kwsysProcess_State_Executing)
{
@ -466,6 +472,10 @@ void kwsysProcess_Delete(kwsysProcess* cp)
int kwsysProcess_SetCommand(kwsysProcess* cp, char const* const* command)
{
int i;
if(!cp)
{
return 0;
}
for(i=0; i < cp->NumberOfCommands; ++i)
{
free(cp->Commands[i]);
@ -490,7 +500,7 @@ int kwsysProcess_AddCommand(kwsysProcess* cp, char const* const* command)
char** newCommands;
/* Make sure we have a command to add. */
if(!command)
if(!cp || !command)
{
return 0;
}
@ -693,12 +703,24 @@ int kwsysProcess_AddCommand(kwsysProcess* cp, char const* const* command)
/*--------------------------------------------------------------------------*/
void kwsysProcess_SetTimeout(kwsysProcess* cp, double timeout)
{
if(!cp)
{
return;
}
cp->Timeout = timeout;
if(cp->Timeout < 0)
{
cp->Timeout = 0;
}
}
/*--------------------------------------------------------------------------*/
void kwsysProcess_SetWorkingDirectory(kwsysProcess* cp, const char* dir)
{
if(!cp)
{
return;
}
if(cp->WorkingDirectory)
{
free(cp->WorkingDirectory);
@ -723,6 +745,11 @@ void kwsysProcess_SetWorkingDirectory(kwsysProcess* cp, const char* dir)
/*--------------------------------------------------------------------------*/
int kwsysProcess_GetOption(kwsysProcess* cp, int optionId)
{
if(!cp)
{
return 0;
}
switch(optionId)
{
case kwsysProcess_Option_HideWindow: return cp->HideWindow;
@ -733,6 +760,11 @@ int kwsysProcess_GetOption(kwsysProcess* cp, int optionId)
/*--------------------------------------------------------------------------*/
void kwsysProcess_SetOption(kwsysProcess* cp, int optionId, int value)
{
if(!cp)
{
return;
}
switch(optionId)
{
case kwsysProcess_Option_HideWindow: cp->HideWindow = value; break;
@ -743,31 +775,35 @@ void kwsysProcess_SetOption(kwsysProcess* cp, int optionId, int value)
/*--------------------------------------------------------------------------*/
int kwsysProcess_GetState(kwsysProcess* cp)
{
return cp->State;
return cp? cp->State : kwsysProcess_State_Error;
}
/*--------------------------------------------------------------------------*/
int kwsysProcess_GetExitException(kwsysProcess* cp)
{
return cp->ExitException;
return cp? cp->ExitException : kwsysProcess_Exception_Other;
}
/*--------------------------------------------------------------------------*/
int kwsysProcess_GetExitValue(kwsysProcess* cp)
{
return cp->ExitValue;
return cp? cp->ExitValue : -1;
}
/*--------------------------------------------------------------------------*/
int kwsysProcess_GetExitCode(kwsysProcess* cp)
{
return cp->ExitCode;
return cp? cp->ExitCode : 0;
}
/*--------------------------------------------------------------------------*/
const char* kwsysProcess_GetErrorString(kwsysProcess* cp)
{
if(cp->State == kwsysProcess_State_Error)
if(!cp)
{
return "Process management structure could not be allocated.";
}
else if(cp->State == kwsysProcess_State_Error)
{
return cp->ErrorMessage;
}
@ -783,7 +819,7 @@ void kwsysProcess_Execute(kwsysProcess* cp)
kwsysProcessCreateInformation si;
/* Do not execute a second time. */
if(cp->State == kwsysProcess_State_Executing)
if(!cp || cp->State == kwsysProcess_State_Executing)
{
return;
}
@ -935,7 +971,7 @@ int kwsysProcess_WaitForData(kwsysProcess* cp, char** data, int* length,
DWORD w;
/* Make sure we are executing a process. */
if(cp->State != kwsysProcess_State_Executing || cp->Killed ||
if(!cp || cp->State != kwsysProcess_State_Executing || cp->Killed ||
cp->TimeoutExpired)
{
return kwsysProcess_Pipe_None;
@ -1070,7 +1106,7 @@ int kwsysProcess_WaitForExit(kwsysProcess* cp, double* userTimeout)
int pipe;
/* Make sure we are executing a process. */
if(cp->State != kwsysProcess_State_Executing)
if(!cp || cp->State != kwsysProcess_State_Executing)
{
return 1;
}
@ -1174,7 +1210,7 @@ void kwsysProcess_Kill(kwsysProcess* cp)
int i;
/* Make sure we are executing a process. */
if(cp->State != kwsysProcess_State_Executing || cp->TimeoutExpired ||
if(!cp || cp->State != kwsysProcess_State_Executing || cp->TimeoutExpired ||
cp->Killed || cp->Terminated)
{
return;